Pavement.



J. 0. WILHELM.

` PAVEMENT.

APPLICATION FILED MAB.31, 1910. 1,003,840. Patented sept. 19,1911.

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J. 0. WILHELM.

PAVEMENT.

APPLICATION FILED MAB. 31, 1910. 1,003,840. Patented sept. 19,1911.

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JOI-IN O. WILHELM, OF: PORTLAND, OREGON.

PAVEMENT.

Specification of Letters Patent.

Patent-ea sept. 19, 1911.

Application filed March 31, 1910. Serial No. 552,684.

To all whom t may concern:

Be it known that I, JOHN 0. VILHELM, a l

citizen of the United States, residing at Portland, in the county ofMultnomah, State of Oregon, have invented certain new and usefulImprovements in Pavements; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to pavements.

The object of the invention is to provide a new and improved pavementwhich is simple and durable in construction, can be very easily laid andprevents cracking and sinkin of the asphalt surface thereof.

V ith these and other objects in view the inventionconsists in thedetails of construction and in the arrangement and combination of partsto be hereinafter more fully described and particularly pointed out inthe appended claims.

In describing the invention in detail reference will be had to theaccompanying drawings wherein like characters of reference denotecorresponding parts in the several views, and in which,

Figure 1 is a top plan View of a portion of a street with the improvedpavement applied thereto, the latter being partly broken away to exposeto View the supporting foundation thereof; Fig. 2, a longitudinalsection of a portion of a street having the pavement applied; Fig. 3, atransverse section on the line 3-3 of Fig. 2.

Referring to the drawings, the street to which the pavement is appliedis shown as excavated to form a suitable base or bed 10: said streetbeing provided at each side with the usual curb blocks 11 and 12.Disposed upon the bed 10 at suitable spaced longitudinal points thereofare a series of alined transversely disposed cement piers 13, each ofwhich is provided in its upper face with a channel 14 extendinglongitudinally to the bed of the street. A plurality of I-beams 15extend longitudinally of the bed and have their lower side supported inthe channels 14 of the piers 13 upon which they are disposed. Each ofthe piers 13 serve to support the adjacent ends of longitudinally alinedI-beams 13; said I-beams which are supported upon piers disposed thesame distance from the centerl of the street being in longitudinalalinement throughout the extent of the pavement.

In order to give the pavement the proper slope from the center towardthe side thereof the beams 13 are constructed with correspondingdiminishing heights on each side of the center o`f the pavement.Disposed transversely of the bed 10 upon the tops of the beams 13 are aplurality of steel plates 16 which have their ends abutting the gutterblocks 11 and 12 and are arranged side to side throughout the length ofthe pavement so as to form a continuous surface and completely cover thepiers 13 and the beams 15. A layer of asphalt 17 is disposed upon theplate 16 andsuitably treated to form the upper surface of the street.

It will be seen that a pavement thus formed is very durable inconstruction and can be very readily and quickly laid at a small cost.It will be further seen that as the surface covering 17 is solidlysupported upon a common foundation, same is not liable to sag, as isfrequently the case in pavements now constructed.

What is claimed is:

1. A paving comprising a foundation layer, a plurality of piers spacedlongitudinally and transversely of the paving with their upper faces inthe same plane and each provided with a channel extending longitudinallyof the pavement, I-beams disposed upon the piers in parallel,longitudinally of the paving and having their lower sides disposed insaid channels respectively, the heights of the beams diminishing fromthe center of the paving in both directions transversely thereof, ametal sheet supported upon the beams and arched transversely of thepaving and a coat4 of asphalt covering the metal plate.

2. A paving comprising a foundation layer, a plurality of piers spacedlongitudinally and transversely of the paving with their upper faces inthe same plane, beams disposed upon the piers in parallel, longi- Intestimony whereof, I aHiX my signa- Juudinally of Jthe paving, theheights of the ture, in presence of two Witnesses. beams diminishingfrom the central ybeam JOHN O WILHELM in both directions transverselyyof Jhe pavu ing, a metal sheet supported upon the beams Witnesses:

and arched transversely of the paving and A. H. MAEGLY, a coatof asphaltcovering the metal plate. A. TICHNER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

